Process for the treatment of wood.



A. P. DERBY (Si 1. H. DARGIE.

PROCESS FOR THE TREATMENT OF WOUD,

' APPHCATION men AUG-7.1913.

1 9 1 $6., $5 5 Patented June 13, 1916.

orney ASHTQH 1F. DERBY AND JAMES H. DARGAE, f)?!" TO I. EEBBY ANDCOMPANY, KNQ, i313 Ii-321 53324331,'MAZSSASHUSETTS, A QGRPDIMTIQZGTEQBNER, MMSSACHUIQETTS, AEESIGWQES PROCESS FQR- THE *fTrQ-LTLEJEEEENT (3F 'WQGD Application. filed august 7, 1913.

To all whom it may comem Be it known that we, mm-rm P. DERBY uhd Jmms H.Dmum, hot-h citizens of the i'nitcd i tutos, i'e 'idiu at Gui'duci', inthe county of Wm-ouster mid fl )ii1i.1i)fl;:ill3ll ofTilflSSilClillEiEtilS, have. illi'el' 9d a new and useful Process forthc Treniment of Wood, of \\'lll(.ll l1fi i'olh'm'ing :1 Specification,accompanied by a drawing forming a purl: of ihe some.

()uzinvention relates to on improved method of treating Wood by whichthe sup is removed and the wood rendered suiuiblo foi' in'uncdiute use,thereby avoiding the long delay incident to the co'z'uino'uiy practisedmethod of seasoning wood by utmos phoi'ic oxposun.

In carrying our improved process into cli'acL we (miploy nu apparatus.shown partly in sectiona view in the accompanying ch'a'u iug, comprisinga chamber 1 in which the material .to he tr-mtcd may he inclosed. Withintho chamber 1 is o. track 2 upon which :1. truck 3 may he moved.carrying the material to he ti'reuteih which in the prio -cub instanceis i'e iii'esecntcd as a piio of boards l spaced apart. as shown Ht 5.5, to allow the introduction of simian around such individual picce, Onesido of the i'ooopltucie inciosing izhc chamber i is provided wiil adoor closing :i 'uinst u gin-dud '4' "which renders tho cluuuhor uii'tight.

Leading from u. HOlU'CC of steam supply under pressure is u pipe 8eutciiugg the chainher 1. and provided with u. Valve 9 by which thesupply of utcum to the chamber l mu ho !'UIl!l1\tl(l. From the chziuihcvl we conduct :i pipe ll) loading to an air pump l1 having :1 dischargenozzle 12 and oiwz'utod through u pision rod )3 mid i'oiuiing eccentric14- which is czii'z'icd upon a shaft 15 and driven from any suiiuhlcsouroc of powci' by moons of :1 bolt pulley Hi. The wood to he lii'cutcdis loaded upon the truck 3. uich piece in:- iu suitably spaced from itsneighbor and the truck placed upon the truck The door (3 is thou closcd,hermetically closing); the chamber 1. Steam is admitted through the pipofor the space of from thirty to fortyiivc minutes at :1 pressure ofabout fifty pounds. Al:- thc end of this period the suppiy of steam isshui; off by tho valve 9 and tho ail pump 11 pm, in opera'sion untilijhe steam and My contained; in ihe chumher 1 is suhstzmi uiiyoiihaiiiszioo.

' to remain in the vacuum thus 4|: then oil-mired produced for a shortperiod. depending SOZYwWiL upon the uoiurc of tho Wood, usually for; onehour for inch in .iho wood is' iii;

sufiicient to prevent the subsoaniziui condom sation of 32mm and toucconmlish ihe more i thoi'ough evaporation of moisture While the woodremains in the vacuum. The lumber is thenremoved from izhe chamber 1thoroughly seasoncd; or deprived'of its sap, and in pi'opei? condi ionfor immediafio use either with or without. further kiln drying,according to the purpose for which it is so be employed.

If the wood is iZG he used for ooh-melt Work, furniture. or interiorfinish. it should be kiln dried by the method now commonly practised bytho application of duty hoaic immediately before such We claim. 1,

The within dassorilied promos of floating wood. con ting in inclosing;ghe Wood in a hcrmeticuliy scidc-{l chamber, subjecicing the Wood insaid chamber to the action of steam under pressure for a procieterminodperiod, maii'ituiniug (lining said period temperature in suidclmmhea:suFicieut to prevent the condensation of sic-mu, exhausting the air andsteam from said chamber at the end of said poi iod. and subjecting saidwood to the notion. of heat during the prcdeterinihe l time \vl'iich itrouiziins in he vacuum thus producai. v

Dutcd this fourth day of August, 1913.

ASHTON DERBY. ii Ai /F1 15 H. DARGIE;

Witnesses Iilhomxwg f BLACK, AMASA B. BRYANT.

